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Article Abstract
Objective: To investigate the effect of three major ginsenosides from mountain ginseng as anticancer substance and explore the underlying mechanism involved in lung cancer.
Methods: The inhibitory proliferation of lung cancer by major five ginsenosides (Rb1, Rb2, Rg1, Rc, and Re) was examined using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay. Calculated 50% inhibition (IC50) values of five ginsenosides were determined and compared each other. Apoptosis by the treatment of single ginsenoside was performed by fluorescence-assisted cytometric spectroscopy. The alterations of apoptosis-related proteins were evaluated by Western blot analysis.
Results: The abundance of ginsenosides in butanol extract of mountain ginseng (BX-MG) was revealed in the order of Rb1, Rg1, Re, Rc and Rb2. Among them, Rb1 was the most effective to lung cancer cell, followed by Rb2 and Rg1 on the basis of relative IC50 values of IMR90 versus A549 cell. The alterations of apoptotic proteins were confirmed in lung cancer A549 cells according to the administration of Rb1, Rb2 and Rg1. The expression levels of caspase-3 and caspase-8 were increased upon the treatment of three ginsenosides, however, the levels of caspase-9 and anti-apoptotic protein Bax were not changed.
Conclusion: Major ginsenosides such as Rb1, Rb2 and Rg1 comprising BX-MG induced apoptosis in lung cancer cells via extrinsic apoptotic pathway rather than intrinsic mitochondrial pathway.
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| http://dx.doi.org/10.1007/s11655-014-1789-8 | DOI Listing |
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